CN111326714A - Method for manufacturing composite electrode used as high-specific-capacity negative electrode - Google Patents

Method for manufacturing composite electrode used as high-specific-capacity negative electrode Download PDF

Info

Publication number
CN111326714A
CN111326714A CN201811523656.6A CN201811523656A CN111326714A CN 111326714 A CN111326714 A CN 111326714A CN 201811523656 A CN201811523656 A CN 201811523656A CN 111326714 A CN111326714 A CN 111326714A
Authority
CN
China
Prior art keywords
graphite
negative electrode
titanium dioxide
composite electrode
mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811523656.6A
Other languages
Chinese (zh)
Inventor
吴若飞
李铮铮
杨兵
徐丽敏
谭迎宾
朱健桦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baoshan Iron and Steel Co Ltd
Original Assignee
Baoshan Iron and Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baoshan Iron and Steel Co Ltd filed Critical Baoshan Iron and Steel Co Ltd
Priority to CN201811523656.6A priority Critical patent/CN111326714A/en
Publication of CN111326714A publication Critical patent/CN111326714A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/364—Composites as mixtures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H01M4/386—Silicon or alloys based on silicon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention relates to a method for manufacturing a composite electrode used as a high-specific-capacity cathode, which comprises the following steps: dispersing the silicon monoxide particles in a surfactant, adding an alcoholic solution of a titanium dioxide precursor, uniformly mixing, drying, and carrying out heat treatment in an inert atmosphere at 400-550 ℃ to obtain the product containing TiO2@ SiO first mixture; uniformly mixing the first mixture with graphite, a conductive agent and a CMC/PAA binder to obtain slurry; coating the slurry on the surface of a current collector, drying at 50-80 ℃, and then carrying out heat treatment at 80-150 ℃ to obtain the titanium dioxide/silica/stoneAn ink composite electrode. Compared with the prior art, the preparation method has the advantages of green and simple process and strong practicability, and the titanium dioxide is coated with the silicon monoxide TiO in advance2The introduction of the structure design of @ SiO and the high-temperature crosslinking technology of the binder CMC/PAA is beneficial to synergistically improving the cycle life of the SiO negative electrode.

Description

Method for manufacturing composite electrode used as high-specific-capacity negative electrode
Technical Field
The invention belongs to the technical field of lithium ion batteries, and relates to a method for manufacturing a composite electrode used as a high-specific-capacity negative electrode.
Background
In recent years, the rapid growth of the lithium ion power battery market has put higher demands on the performance of high capacity negative electrode materials. In the anode material, the theoretical capacity of Silica (SiO) is high (1970 mAh/g). In addition, the silicon monoxide also has the advantages of lower working voltage, abundant raw materials and the like. Compared with silicon, because the silicon monoxide can generate a silicon and oxide mixed phase structure in the lithium ion deintercalation process, the volume expansion (-200%) in the charge and discharge process is favorably relieved, and the cycling stability of the battery is improved. Currently, the practical application technology of the high-capacity silicon negative electrode is to add a certain mass of silicon monoxide into a negative electrode carbon material so as to overcome the defect of low specific capacity of the graphite negative electrode. At present, breakthrough and mass production of the technology are still not realized domestically and internationally, mainly because the multiplying power performance and the cycling stability of the silicon material are seriously influenced by the problems of lower electronic conductivity of the silicon-based material, volume expansion and contraction in the charging and discharging processes and the like. Therefore, the industrialization process of the silicon-carbon negative electrode material can be promoted only by solving the problems of the expansion defect of the high-capacity negative electrode and the poor cyclicity. The technical thresholds faced by high capacity cathodes were analyzed as follows: the problem of volume expansion of the high-capacity cathode can be really solved, and the technical scheme of ideal silicon materials and structures is not clear; the preparation process of the electrode of the silicon-carbon composite material is not clear; the matching of the active with the binder and conductive agent is left to be studied for targeted analysis.
The titanium dioxide is used as the metal oxide cathode and has the advantages of low cost, controllable particle size, stable structure in the charging and discharging process and the like. But the available specific capacity of titanium dioxide is low (-168 mAh/g). In the structural design of the silicon-carbon cathode material, a controllable titanium dioxide coating layer can be selected on the surface of a silicon-based material to serve as a buffer layer in the silicon expansion process, so that the cycle life of the silicon-carbon cathode is further improved. Chinese patent publication No. CN106972151A discloses a method for preparing a lithium ion battery negative electrode composite pole piece, which is composed of silicon, titanium oxide, methyl methacrylate cracking carbon and copper foil thereof, and the negative electrode piece is manufactured without using binder and conductive agent, and the manufacturing process of the pole piece involves the use of a large amount of organic reagents such as methyl methacrylate, dimethylformamide, triethanolamine, hydrogen peroxide and the like. The method has the advantages of complex process, high cost and easy pollution problem, and simultaneously, the silicon-carbon pole piece conductive agent and the adhesive in practical application are inevitable, so the patent relates to the technical field of difficult large-scale industrial application.
Therefore, a preparation method which is low in cost, simple in process, green in process and capable of being applied to the high-specific-capacity silicon oxide and graphite composite negative electrode needs to be developed at present. The invention designs and develops a method for manufacturing a composite electrode used as a high-specific-capacity cathode, which mainly comprises the step of coating titanium dioxide on silicon oxide TiO2The introduction of the structure design of @ SiO and the cross-linking technology of CMC/PAA as a binder is beneficial to synergistically improving the cycle life of the SiO/graphite cathode.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned disadvantages, and providing a method for manufacturing a composite electrode for a high specific capacity negative electrode, which is mainly achieved by a mixing technique of a structure in which a titania-coated silica is used with a graphite negative electrode (hereinafter, each of these is simply referred to as a method for manufacturing a titania/silica/graphite composite electrode).
The invention is realized by the following technical scheme:
the invention provides a method for manufacturing a composite electrode used as a high-specific-capacity cathode, which comprises the following steps:
dispersing the silicon monoxide particles in a surfactant, adding an alcoholic solution of a titanium dioxide precursor, uniformly mixing, drying, and inerting at 400-550 DEG CHeat treatment in an atmosphere to obtain a product containing TiO2@ SiO first mixture;
uniformly mixing the first mixture with graphite, a conductive agent and a CMC/PAA binder to obtain slurry;
and coating the slurry on the surface of a current collector, drying at 50-80 ℃, and then carrying out heat treatment at 80-150 ℃ to obtain the titanium dioxide/silicon monoxide/graphite composite electrode.
Preferably, in the slurry, the weight percentage of the titanium dioxide/silicon monoxide/graphite ternary complex is 60-98%, the weight percentage of the conductive agent is 1-39%, and the weight percentage of the CMC/PAA binder is 1-39%.
Preferably, the particle size of the silica particles is 50nm to 50 μm.
Preferably, the mass ratio of the silica particles to the surfactant is 1: (0.1 to 100).
Preferably, the surfactant is one or more of cetyl trimethyl ammonium bromide, sodium dodecyl benzene sulfonate, polyvinylpyrrolidone and polyoxyethylene polyoxypropylene ether block copolymer.
Preferably, the titanium dioxide precursor is tetrabutyl titanate soluble in ethanol.
Preferably, the mass ratio of the silicon monoxide to the titanium dioxide in the first mixture is 1 (0.01-1).
Preferably, in the slurry, TiO2The mass ratio of @ SiO to graphite is 1 (0-100).
Preferably, in the slurry, TiO2The mass ratio of the total mass of the @ SiO and the graphite to the conductive agent is (2.54-99): 1; TiO 22The mass ratio of the total mass of @ SiO and graphite to CMC/PAA is (1.54-98): 1.
Preferably, in the binder, the mass ratio of CMC to PAA is 1: (0.01-100).
Compared with the prior art, the invention has the following beneficial effects:
the preparation method of the invention has the advantages of green and simple processAnd has strong practicability, and the titanium dioxide is coated with the silicon oxide TiO in advance2The introduction of the structure design of @ SiO and the high-temperature crosslinking technology of the binder CMC/PAA is beneficial to synergistically improving the cycle life of the SiO negative electrode.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a first charge-discharge diagram of a typical titania/silica/graphite composite electrode made in accordance with the present invention;
FIG. 2 is a first charge-discharge diagram of a typical titania/silica composite electrode made in accordance with the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
The basic principle of the manufacturing method of the titanium dioxide/monox/graphite composite electrode used as the high specific capacity negative electrode in the following embodiments is as follows: firstly, uniformly dispersing silicon oxide particles in a surfactant solution, then slowly dripping a certain amount of alcoholic solution of a titanium dioxide precursor into the mixture, stirring for a period of time, and then transferring to a forced air drying oven for drying; the resulting mixture is then heat treated under an inert atmosphere. And then mixing the mixture with graphite, a conductive agent and a CMC/PAA binder according to a certain mass ratio, uniformly stirring, coating on a current collector, and putting into an oven for drying. And finally, transferring the pole piece to a vacuum drying oven for heat treatment to ensure that the CMC/PAA binder plays a role of binding force through a crosslinking reaction. And (4) cooling the drying oven to room temperature, and taking out the obtained pole piece to obtain the finally obtained titanium dioxide/silicon monoxide/graphite composite electrode.
Example 1
The method for manufacturing the titanium dioxide/silicon monoxide/graphite composite electrode used as the high specific capacity negative electrode in the embodiment is as follows:
1. uniformly dispersing 10g of silica particles (particle size of 10 microns) in 1g of cetyltrimethylammonium bromide solution to obtain a mixture A;
2. then, 50ml of an ethanol solution containing 5g of tetrabutyl titanate was slowly added dropwise to the above mixture A, stirred for 1 hour, and then transferred to a forced air drying oven for air drying at 60 ℃ to obtain a mixture B;
3. then carrying out heat treatment on the obtained mixture B for 4 hours at 550 ℃ under the inert atmosphere to obtain a mixture C;
4. then 1.38g of the mixture C is mixed with 7.82g of artificial graphite, 0.4g of acetylene black, 0.2g of CMC (1.2%) and 0.2g of PAA (35%) mixed binder, the mixture is evenly stirred and coated on a current collector, and the current collector is put into an oven to be dried at 80 ℃.
5. And finally, transferring the pole piece to a vacuum drying oven at 150 ℃ for heat treatment for 12h to ensure that the CMC/PAA binder plays a role of binding force through a crosslinking reaction.
6. And (3) cooling the drying oven to room temperature, and taking out the obtained pole piece, namely the finally obtained titanium dioxide/silicon monoxide/graphite composite electrode piece, wherein the performance of the pole piece is shown in figure 1.
Example 2
The method for manufacturing the titanium dioxide/silicon monoxide/graphite composite electrode used as the high specific capacity negative electrode in the embodiment is as follows:
1. uniformly dispersing 10g of silica particles (the particle size is 200 nanometers) in 5g of sodium dodecyl benzene sulfonate solution to obtain a mixture A;
2. then, 50ml of an ethanol solution containing 20g of tetrabutyl titanate was slowly added dropwise to the above mixture A, stirred for 1 hour, and then transferred to an air-blast drying oven to be air-dried at 80 ℃ to obtain a mixture B;
3. then carrying out heat treatment on the obtained mixture B for 5 hours at 600 ℃ in an inert atmosphere to obtain a mixture C;
4. then 0.92g of the mixture C is mixed with 8.28g of natural graphite, 0.4g of graphene, 0.3g of CMC (2%) and 0.1g of PAA (50%) mixed binder, the mixture C is coated on a current collector after being uniformly stirred, and the current collector is put into an oven to be dried at 80 ℃.
5. And finally, transferring the pole piece to a vacuum drying oven at 120 ℃ for heat treatment for 6h to ensure that the CMC/PAA binder plays a role of binding force through a crosslinking reaction.
6. And (4) cooling the drying oven to room temperature, and taking out the obtained pole piece to obtain the finally obtained titanium dioxide/silicon monoxide/graphite composite electrode piece.
Example 3
The method for manufacturing the titanium dioxide/nano silicon/graphite composite electrode used as the high specific capacity negative electrode in the embodiment is as follows:
1. uniformly dispersing 10g of silicon nanoparticles (the particle size is 200 nanometers) in 20g of polyvinylpyrrolidone solution to obtain a mixture A;
2. then, 50ml of an ethanol solution containing 40g of tetrabutyl titanate was slowly added dropwise to the above mixture A, stirred for 1 hour, and then transferred to a forced air drying oven to be air-dried at 80 ℃ to obtain a mixture B;
3. then carrying out heat treatment on the obtained mixture B for 8h at 500 ℃ in an inert atmosphere to obtain a mixture C;
4. then 4.6g of the mixture C is mixed with 2.3g of natural graphite, 2.3g of soft carbon, 0.4g of graphene, 0.2g of CMC (1.5%) and 0.2g of PAA (40%) mixed binder, the mixture C is coated on a current collector after being uniformly stirred, and the current collector is put into an oven to be dried at 80 ℃.
5. And finally, transferring the pole piece to a vacuum drying oven at 120 ℃ for heat treatment for 6h to ensure that the CMC/PAA binder plays a role of binding force through a crosslinking reaction.
6. And (4) cooling the drying oven to room temperature, and taking out the obtained pole piece to obtain the finally obtained titanium dioxide/nano silicon/graphite composite electrode piece.
Example 4
The method for manufacturing the titanium dioxide/silicon monoxide/graphite composite electrode used as the high specific capacity negative electrode in the embodiment is as follows:
1. uniformly dispersing 10g of silica particles (the particle size is 50 microns) in 50g of sodium dodecyl benzene sulfonate solution to obtain a mixture A;
2. then, 50ml of an ethanol solution containing 4g of tetrabutyl titanate was slowly added dropwise to the above mixture A, stirred for 1 hour, and then transferred to an air-blast drying oven to be air-dried at 80 ℃ to obtain a mixture B;
3. then carrying out heat treatment on the obtained mixture B for 5 hours at 600 ℃ in an inert atmosphere to obtain a mixture C;
4. then 1.38g of the mixture C is mixed with 2g of artificial graphite, 5.82g of hard carbon, 0.4g of carbon nano tube, 0.3g of CMC (2%) and 0.1g of PAA (50%) mixed binder, the mixture C is coated on a current collector after being uniformly stirred, and the current collector is put into an oven and dried at the temperature of 80 ℃.
5. And finally, transferring the pole piece to a vacuum drying oven at 120 ℃ for heat treatment for 6h to ensure that the CMC/PAA binder plays a role of binding force through a crosslinking reaction.
6. And (4) cooling the drying oven to room temperature, and taking out the obtained pole piece to obtain the finally obtained titanium dioxide/silicon monoxide/graphite composite electrode piece.
Example 5
The method for manufacturing the titanium dioxide/silicon monoxide/graphite composite electrode used as the high specific capacity negative electrode in the embodiment is as follows:
1. uniformly dispersing 10g of silica particles (the particle size is 50 microns) in 50g of sodium dodecyl benzene sulfonate solution to obtain a mixture A;
2. then, 50ml of an ethanol solution containing 4g of tetrabutyl titanate was slowly added dropwise to the above mixture A, stirred for 1 hour, and then transferred to an air-blast drying oven to be air-dried at 80 ℃ to obtain a mixture B;
3. then carrying out heat treatment on the obtained mixture B for 5 hours at 600 ℃ in an inert atmosphere to obtain a mixture C;
4. then 1.38g of the mixture C is mixed with 1.82g of natural graphite, 6g of mesocarbon microbeads, 0.15g of CMC (2%) and 0.05g of PAA (50%) mixed binder, the mixture C is coated on a current collector after being uniformly stirred, and the current collector is put into an oven to be dried at 80 ℃.
5. And finally, transferring the pole piece to a vacuum drying oven at 150 ℃ for heat treatment for 6h to ensure that the CMC/PAA binder plays a role of binding force through a crosslinking reaction.
6. And (4) cooling the drying oven to room temperature, and taking out the obtained pole piece to obtain the finally obtained titanium dioxide/silicon monoxide/graphite composite electrode piece.
Example 6
The method for manufacturing the titanium dioxide/silicon monoxide composite electrode used as the high specific capacity negative electrode in the embodiment is as follows:
1. uniformly dispersing 10g of silica particles (the particle size is 50 nanometers) in 100g of polyethylene glycol solution to obtain a mixture A;
2. then, 50ml of an ethanol solution containing 5g of tetrabutyl titanate was slowly added dropwise to the above mixture A, stirred for 1 hour, and then transferred to an air-blast drying oven to be air-dried at 80 ℃ to obtain a mixture B;
3. then carrying out heat treatment on the obtained mixture B for 5 hours at 600 ℃ in an inert atmosphere to obtain a mixture C;
4. then 9.2g of mixture C, 0.4g of carbon fiber, 0.3g of CMC (2 percent) and 0.1g of PAA (50 percent) are mixed with a binder, evenly stirred, coated on a current collector and put into an oven for drying at 90 ℃.
5. And finally, transferring the pole piece to a vacuum drying oven at 150 ℃ for heat treatment for 24h to ensure that the CMC/PAA binder plays a role of binding force through a crosslinking reaction.
6. And (3) cooling the drying oven to room temperature, and taking out the obtained pole piece, namely the finally obtained titanium dioxide/silicon monoxide composite electrode piece, wherein the performance of the pole piece is shown in figure 2.
In summary, the patent designs and develops a manufacturing method of a titanium dioxide/silicon monoxide/graphite composite electrode plate used as a high-specific-capacity negative electrode. Mainly by pre-coating the silica TiO with titanium dioxide2The introduction of the structure design of @ SiO and the cross-linking technology of CMC/PAA as a binder is beneficial to synergistically improving the cycle life of the SiO/graphite cathode. The preparation method disclosed by the invention has the advantages of green and simple process, strong practicability and the like.
In summary, the present invention is only a preferred embodiment, and not intended to limit the scope of the invention, and all equivalent changes and modifications in the shape, structure, characteristics and spirit of the present invention described in the claims should be included in the scope of the present invention.

Claims (11)

1. A method for manufacturing a composite electrode used as a high-specific-capacity negative electrode is characterized by comprising the following steps:
dispersing the silicon monoxide particles in a surfactant, adding an alcoholic solution of a titanium dioxide precursor, uniformly mixing, drying, and carrying out heat treatment in an inert atmosphere at 400-550 ℃ to obtain the product containing TiO2@ SiO first mixture;
uniformly mixing the first mixture with graphite, a conductive agent and a CMC/PAA binder to obtain slurry;
and coating the slurry on the surface of a current collector, drying at 50-80 ℃, and then carrying out heat treatment at 80-150 ℃ to obtain the titanium dioxide/silicon monoxide/graphite composite electrode.
2. The method for manufacturing a composite electrode used as a high specific capacity negative electrode according to claim 1, wherein the slurry contains 60 to 98 weight percent of titanium dioxide/silicon monoxide/graphite ternary complex, 1 to 39 weight percent of conductive agent, and 1 to 39 weight percent of CMC/PAA binder.
3. The method of claim 1, wherein the particle size of the silica particles is between 50nm and 50 μm.
4. The method of claim 1, wherein the weight ratio of the silica particles to the surfactant is 1: (0.1 to 100).
5. The method for manufacturing a composite electrode used as a high specific capacity negative electrode according to claim 1, wherein the surfactant is one or more of cetyl trimethyl ammonium bromide, sodium dodecyl benzene sulfonate, polyvinylpyrrolidone, and polyoxyethylene polyoxypropylene ether block copolymer.
6. The method of claim 1, wherein the titanium dioxide precursor is tetrabutyl titanate soluble in ethanol.
7. The method for manufacturing the composite electrode used as the high-specific-capacity negative electrode according to claim 1, wherein the mass ratio of the silicon monoxide to the titanium dioxide in the first mixture is 1 (0.01-1).
8. The method of claim 1, wherein the slurry comprises TiO, and wherein the slurry comprises a composite electrode for a high specific capacity negative electrode2The mass ratio of @ SiO to graphite is 1 (0-100).
9. The method of claim 1, wherein the slurry comprises TiO, and wherein the slurry comprises a composite electrode for a high specific capacity negative electrode2The mass ratio of the total mass of the @ SiO and the graphite to the conductive agent is (2.54-99): 1; TiO 22The mass ratio of the total mass of @ SiO and graphite to CMC/PAA is (1.54-98): 1.
10. The method for manufacturing a composite electrode used as a high specific capacity negative electrode according to claim 1, wherein the binder comprises CMC and PAA in a mass ratio of 1: (0.01-100).
11. The method for manufacturing a composite electrode used as a high specific capacity negative electrode according to claim 1, wherein the graphite is one or more selected from artificial graphite, natural graphite, hard carbon, soft carbon and mesocarbon microbeads.
CN201811523656.6A 2018-12-13 2018-12-13 Method for manufacturing composite electrode used as high-specific-capacity negative electrode Pending CN111326714A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811523656.6A CN111326714A (en) 2018-12-13 2018-12-13 Method for manufacturing composite electrode used as high-specific-capacity negative electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811523656.6A CN111326714A (en) 2018-12-13 2018-12-13 Method for manufacturing composite electrode used as high-specific-capacity negative electrode

Publications (1)

Publication Number Publication Date
CN111326714A true CN111326714A (en) 2020-06-23

Family

ID=71168390

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811523656.6A Pending CN111326714A (en) 2018-12-13 2018-12-13 Method for manufacturing composite electrode used as high-specific-capacity negative electrode

Country Status (1)

Country Link
CN (1) CN111326714A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113782734A (en) * 2021-08-24 2021-12-10 南昌大学 Preparation method of silicon monoxide negative pole piece
CN114927747A (en) * 2022-05-26 2022-08-19 安徽力源新能源有限公司 High-rate discharge graphene manganese-rich lithium ion battery for fire emergency first aid

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105576185A (en) * 2016-03-18 2016-05-11 天津力神电池股份有限公司 Silicon-carbon composite cathode pole piece of lithium ion battery and preparation method of silicon-carbon composite cathode pole piece
CN108172764A (en) * 2017-12-28 2018-06-15 福建猛狮新能源科技有限公司 A kind of height ratio capacity silicon-based anode and its manufacturing method
US20180269483A1 (en) * 2017-03-20 2018-09-20 North Carolina Agricultural And Technical State University Prelithiated silicon particles for lithium ion batteries
CN108878831A (en) * 2018-06-27 2018-11-23 深圳大学 A method of improving silicon based anode material electric conductivity

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105576185A (en) * 2016-03-18 2016-05-11 天津力神电池股份有限公司 Silicon-carbon composite cathode pole piece of lithium ion battery and preparation method of silicon-carbon composite cathode pole piece
US20180269483A1 (en) * 2017-03-20 2018-09-20 North Carolina Agricultural And Technical State University Prelithiated silicon particles for lithium ion batteries
CN108172764A (en) * 2017-12-28 2018-06-15 福建猛狮新能源科技有限公司 A kind of height ratio capacity silicon-based anode and its manufacturing method
CN108878831A (en) * 2018-06-27 2018-11-23 深圳大学 A method of improving silicon based anode material electric conductivity

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
黄书万等: "《表面组装技术与片式元器件》", 30 September 1997, 电子科技大学出版社 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113782734A (en) * 2021-08-24 2021-12-10 南昌大学 Preparation method of silicon monoxide negative pole piece
CN113782734B (en) * 2021-08-24 2023-04-07 南昌大学 Preparation method of silicon monoxide negative pole piece
CN114927747A (en) * 2022-05-26 2022-08-19 安徽力源新能源有限公司 High-rate discharge graphene manganese-rich lithium ion battery for fire emergency first aid

Similar Documents

Publication Publication Date Title
CN104638240B (en) Method for preparing lithium ion battery silicon carbon composite anode material and product prepared by method
CN106532012B (en) A kind of sulphur-biomass carbon/transition metal combination electrode material and its preparation method and application
CN107425185B (en) Preparation method of carbon nanotube-loaded molybdenum carbide material and application of carbon nanotube-loaded molybdenum carbide material in lithium-sulfur battery positive electrode material
CN107623116B (en) Lithium ion battery cathode composite material and preparation method thereof
CN106711461A (en) Spherical porous silicon/carbon composite material as well as preparation method and application thereof
CN107611411B (en) Preparation method and application of three-dimensional hierarchical porous nitrogen-doped carbon-coated silicon composite material
CN105552324A (en) Preparation method for lithium iron phosphate coated lithium nickel cobalt manganese composite material
CN110233256B (en) Composite nano material and preparation method thereof
CN103346324A (en) Lithium ion battery cathode material and preparation method thereof
CN108336311A (en) A kind of preparation method of the silicon-carbon cathode material of doping Argent grain
CN105742695B (en) A kind of lithium ion battery and preparation method thereof
CN102623685A (en) High-power lithium-ion battery anode material, preparation method thereof and negative plate
CN107204431B (en) Lithium ion battery negative electrode active material, preparation method thereof, negative electrode containing negative electrode active material and battery
CN104659333A (en) Preparation method of Mg2Si/SiOx/C composite cathode material membrane electrode of lithium ion secondary battery
CN109950549A (en) A kind of lithium ion battery collector and preparation method thereof
CN112563503A (en) Self-filling coated silicon-based composite material, and preparation method and application thereof
CN102969509A (en) Preparation method of lithium ion battery silicon carbon composite material
CN106876684A (en) A kind of lithium battery silicium cathode material, negative plate and the lithium battery prepared with it
CN111063875A (en) Spongy porous structure silicon-based composite material and preparation method thereof
CN108878774A (en) A kind of complex carbon material and its preparation method and application
CN111326721B (en) Preparation method of composite negative electrode pre-embedded lithium material
CN111326714A (en) Method for manufacturing composite electrode used as high-specific-capacity negative electrode
CN108923027B (en) Organic acid modified Si/TiO2Negative electrode material of/rGO @ C lithium ion battery and preparation method and application thereof
CN108598417A (en) A kind of conductive black modification aerosil sulfur loaded composite positive pole and preparation method thereof
CN113285050A (en) Li-M-X-based solid lithium battery anode and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20200623